Take the long way home through this exciting tunnel. It has four different sounds that activate when the train passes through and onto new adventures. The adventure tunnel is compatible with all BRIO railway systems. Try not fall off the bridge when you go to push the sound button. Includes 1x Adventure Tunnel. The item measures 23.3 x 17.8 x 12.2cm. Suitable for ages 3 Years and up. Manufactured to BRIO’s high standards and from FSC Certified wood. 2x AA Batteries required